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Antena GPS BNC para Garmin 152H 421s 431s 441s 521s 526s 531s 536s 541s|Adaptadores AC/DC| - AliExpress
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Configuring the Communication Settings in the Garmin GPSMap 421S and GPSMap 521S with GPS City - YouTube
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Garmin GPSMAP 521S GPS chartplotter with 5" display and satellite-enhanced worldwide basemap at Crutchfield
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